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Research on synthesis of low dielectric loss reactive phosphorus-containing flame retardants and properties of its epoxy composite materials
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Junyi HUANG1, Jing ZOU2, You ZHOU2, Yuanlin ZHOU1, Anbin TANG1, 2
Insulating Materials | 2025, 58(5) : 42 - 48
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Insulating Materials | 2025, 58(5): 42-48
• Material Research •
Research on synthesis of low dielectric loss reactive phosphorus-containing flame retardants and properties of its epoxy composite materials
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Junyi HUANG1, Jing ZOU2, You ZHOU2, Yuanlin ZHOU1, Anbin TANG1, 2
Affiliations
  • 1. School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, China
  • 2. Sichuan EM Technology Co., Ltd., Mianyang 621024, China
Published: 2025-05-20 doi: 10.16790/j.cnki.1009-9239.im.2025.05.006
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A flame retardant monomer 6-(2,5-bis ((4-vinylbenzyl) oxy) phenyl) dibenzo [c,e][1,2] phosphono-6-oxide (DOPVB) was synthesized by using 10-(2,5-dihydroxyphenyl)-10-hydro-9-oxy-10-phosphophenanthrene-10-oxide (DOPO-HQ) and 4-chloromethyl styrene (VBC) as raw materials. The DOPVB flame retardant was compounded with epoxy resin (EP) to prepare EP/DOPVB composites with different phosphorus contents, and their thermal, flame retardant, and dielectric properties were tested. The results show that the optimal synthesis conditions for DOPVB is that the molar ratio of reactants DOPO-HQ, VBC, and K2CO3 is 1∶2.2∶3.0, and the reaction time is 6 hours, then the yield is 74.55%. The EP/DOPVB cured material with a phosphorus content of 2.5% has the best comprehensive performance, its glass transition temperature is 130.4℃, which is 45.21% higher than that of pure EP. The dielectric constant is 2.98 and the dielectric loss factor is 0.005 03, which is 21.99% and 72.16% lower than that of pure EP, respectively. The vertical combustion test of the composite material prepared from the cured material reaches V-0 level, with a limit oxygen index of 67.4%.

halogen-free flame retardants  /  reactive flame retardants  /  flame retardant properties  /  dielectric properties
Junyi HUANG, Jing ZOU, You ZHOU, Yuanlin ZHOU, Anbin TANG. Research on synthesis of low dielectric loss reactive phosphorus-containing flame retardants and properties of its epoxy composite materials[J]. Insulating Materials, 2025 , 58 (5) : 42 -48 . DOI: 10.16790/j.cnki.1009-9239.im.2025.05.006
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2025.05.006
  • Receive Date：2024-07-10
  • Online Date：2025-12-04
  • Published：2025-05-20
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History
  • Received：2024-07-10
  • Revised：2024-08-21
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Affiliations
    1. School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, China
    2. Sichuan EM Technology Co., Ltd., Mianyang 621024, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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